[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231109-tidss-probe-v2-10-ac91b5ea35c0@ideasonboard.com>
Date: Thu, 09 Nov 2023 09:38:03 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Aradhya Bhatia <a-bhatia1@...com>,
Devarsh Thakkar <devarsht@...com>,
Jyri Sarha <jyri.sarha@....fi>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Francesco Dolcini <francesco@...cini.it>,
Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
stable@...r.kernel.org
Subject: [PATCH v2 10/11] drm/tidss: Fix atomic_flush check
tidss_crtc_atomic_flush() checks if the crtc is enabled, and if not,
returns immediately as there's no reason to do any register changes.
However, the code checks for 'crtc->state->enable', which does not
reflect the actual HW state. We should instead look at the
'crtc->state->active' flag.
This causes the tidss_crtc_atomic_flush() to proceed with the flush even
if the active state is false, which then causes us to hit the
WARN_ON(!crtc->state->event) check.
Fix this by checking the active flag, and while at it, fix the related
debug print which had "active" and "needs modeset" wrong way.
Cc: stable@...r.kernel.org
Fixes: 32a1795f57ee ("drm/tidss: New driver for TI Keystone platform Display SubSystem")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
drivers/gpu/drm/tidss/tidss_crtc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
index 5e5e466f35d1..7c78c074e3a2 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.c
+++ b/drivers/gpu/drm/tidss/tidss_crtc.c
@@ -169,13 +169,13 @@ static void tidss_crtc_atomic_flush(struct drm_crtc *crtc,
struct tidss_device *tidss = to_tidss(ddev);
unsigned long flags;
- dev_dbg(ddev->dev,
- "%s: %s enabled %d, needs modeset %d, event %p\n", __func__,
- crtc->name, drm_atomic_crtc_needs_modeset(crtc->state),
- crtc->state->enable, crtc->state->event);
+ dev_dbg(ddev->dev, "%s: %s is %sactive, %s modeset, event %p\n",
+ __func__, crtc->name, crtc->state->active ? "" : "not ",
+ drm_atomic_crtc_needs_modeset(crtc->state) ? "needs" : "doesn't need",
+ crtc->state->event);
/* There is nothing to do if CRTC is not going to be enabled. */
- if (!crtc->state->enable)
+ if (!crtc->state->active)
return;
/*
--
2.34.1
Powered by blists - more mailing lists